<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			body{
				font-weight: bolder;
				font-size: 24px;
			}
			#box{
				width: 1200px;
				border: 1px solid red;
				margin: 40px 40px;
				display: flex;
				/* flex-direction: row-reverse;  横向从右到左 */
				/* flex-direction: row;     横向从左到右  为默认的*/
				flex-direction: column;  纵向从上到下
				/* flex-direction: column-reverse;  纵向从下到上 */
			}
			.cloumn{
				width: 100px;
				height: 100px;
				border: 1px solid black;
			}
		</style>
	</head>
	<body>
		<div id="box">
			<div class="cloumn" id="one">一</div>
			<div class="cloumn" id="two">二</div>
			<div class="cloumn" id="three">三</div>
			<div class="cloumn" id="four">四</div>
			<div class="cloumn" id="five">五</div>
			<div class="cloumn" id="six">六</div>
		</div>
	</body>
</html>
